706_S2006_Exam4 - Name 7.06 Cell Biology EXAM#4 This is an...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Name: _________________________________ 1 7.06 Cell Biology EXAM #4 May 23, 2006 This is an OPEN BOOK exam, and you are allowed access to books, a calculator, and notes BUT NOT computers or any other types of electronic devices. Please write your answers in PEN (not pencil) to the questions in the space allotted. Please write only on the FRONT SIDE of each sheet, as we will Xerox all of the exams and thus only grade writing on the front. And be sure to put your NAME ON EACH PAGE in case they become separated! There are SEVEN pages including this cover sheet. Question 1. 21 pts __________ Question 2. 22 pts __________ Question 3. 20 pts __________ Question 4. 20 pts __________ Question 5. 17 pts __________ TOTAL 100 pts __________
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Name: _________________________________ 2 Question 1. (21 pts) Answer the following questions about actin and microfilaments. (a, 3 pts) What happens (net growth, net shrinkage, or no net change) to filament length when microfilaments are incubated at each of the following concentrations of monomer? …a monomer concentration equal to the Cc for the (–) end? …a monomer concentration equal to the Cc for the (+) end? …a monomer concentration equal to the Cc for the filament? (b, 6 pts) What happens (net growth, net shrinkage, or no net change) at each end when microfilaments are incubated at each of the following concentrations of monomer? …a monomer concentration equal to the Cc for the (–) end? …a monomer concentration equal to the Cc for the (+) end? …a monomer concentration equal to the Cc for the filament? (c, 4 pts) Cytochalasin D and latrunculin both lead to the destabilization of microfilaments. However cytochalasin D binds to F-actin and latrunculin binds to G- actin. Explain how this difference in mechanism can still lead to the same effect.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern